Fix an overflow in format_to_n (#2029)

2020-11-24 08:22:12 -08:00
parent df66516ed3
commit b8957f50c3
2 changed files with 6 additions and 1 deletions
@@ -1967,6 +1967,11 @@ TEST(FormatTest, FormatToN) {
  result = fmt::format_to_n(buffer, 4, "{}", "ABCDE");
  EXPECT_EQ(5u, result.size);
  EXPECT_EQ("ABCD", fmt::string_view(buffer, 4));
+
+  buffer[3] = 'x';
+  result = fmt::format_to_n(buffer, 3, "{}", std::string(1000, '*'));
+  EXPECT_EQ(1000u, result.size);
+  EXPECT_EQ("***x", fmt::string_view(buffer, 4));
 }

 TEST(FormatTest, WideFormatToN) {